Gage-pin for printing-presses



(No Model.) *l I I J. W. EGGLIISTON. GAGE PIN FOR PRINTING PRESSES.

No. 558,551. Patented Apr. 21, 1896.

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ANDREW B UMH/wl. Primo umu wAsnlNGrOrLu r NITED STATES PATENT OFFICE.

.IAMES W. EGGLESTON, OF MINNEAPOLIS, MINNESOTA.

GAG E-PIN FOR PRINTING-PRESS ES.

SPECIFICATION forming part of Letters Patent No. 558,551, dated April 21, 1896.

Application tiled April 22, 1895. Serial No. 546.597. (No model.)

To @ZZ whom it may concern..-

Be it known that I, JAMES W. EGGLEsToN, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Printers7 Gage-Pins; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved printers gage-pin.

To this end my invention consists of the novel features of construction hereinafter described, and defined in the claim.

The accompanying drawings .illustrate my invention. Therein like letters refer to like parts.

Figure 1 is a plan view with some parts broken away, showing my improved gage-pin as applied in use. Fig. 2 is a perspective view of my gage-pin detached. Fig. 3 is a plan view of the pin shown in Figs. 1 and 2 in position on part of the platen, some parts being broken away and with part of a card in position on the platen. Fig. 4 is a section on the line fr x' of Fig. 3 with the platen omitted. Fig. 5 is a sectional view of the gage-pin detached on the same line as Fig. 4., and Fig. 6 is a transverse section on the line 002 m2 of Fig. 3 with the platen omitted.

a a. a2 represent the parts of the platen of a printing-press. Of the said parts, a represents the tympan, a the rigid body or backing, and a2 the clamping-yokes which secure the tympan to the body oi' the platen. b represents a card in position on the said platen for receiving an impression under the printing action of the press, the lines of printed impressions being indicated at b on the said card.

Referring now to the gage-pin, c represents a thin-edged vertical plate, constituting the face or gage plate proper.

c are thin-edged vertical side flanges or feet extending backward from the ends of the plate c at right angles thereto.

c2 is a spring pin or brad, preferably of steel, which is centrally secured to the lower edge of the face-plate c, and extends backward therefrom between the feet or flanges c' at a slight downward dip in respect thereto.

The face-plate c is provided with the top flange c3, extending forward from its face. A spring-linger c4 is secured to the forward edge of the top flange or guard-lip c3, central thereof, which spring-finger cL1 extends downward and outward and is curved slightly near its outer end, as best shown in Figs. 2, et, and 5. The said spring-finger c4 is made up of extremely fine steel wire of such crosssection that it will occupy but very little space and will readily lie between the lines of type when the impressionis being made. Hence the said spring-finger c4 may be made of any desired length which is needed to prevent the card or other article being printed from tilting or being blown sidewise off from the platen or away from the gage-pin, and will, nevertheless, work between the lines of type in the action of the press, and will therefore not interfere with the impression.

The gage-pin is applied as shown in Figs. l, 3, 4, and G. It is held in vposition on the tympan under the clamping action which is securable bythe coperation of the thin-edged side flanges or feet c and the spring-brad c2. The said brad engages under the tympan; but its point is not brought back upward through the tympan, but remains constantly under the same. The feet c/ overlie the tympan, and in virtue of the relation of the said feet c to the base of the brad c2 the tympan will be slightly lifted or buckled between the feet by the base of the brad; or, otherwise stated, the feet will depress or crease the tympan slightly and the brad will lift the tympan slightly at its base when the gage-pin is forced home into its working position. This relation of the feet c' and the brad c2 to the tympan a is best shown in Fig. 6. In virtue of this construction the said feet c and brad c2 will clamp the gage-pin to the tympan and securely hold the same from motion in any direction, the clamping hold thus obtained being sufficient to resist quite a considerable force. The gage-pin can therefore neither be tilted in any direction or sheared sidewise or be disturbed in any way. This fact, taken together with the advantages already noted as resulting from the spring- IOO finger c4, renders this gage-pin an extremely efcient and convenient one, resulting in the saving of a large amount of labor and insuring a true impression from the type on the card or other article to be printed, in so far as the same depends in any Way upon the holding of the card properly positioned on the platen. As the spring-fingers c4 Work bef tween the lines of type, they connot interfere With the impression, as already noted, and will not only hold the card or article D from tilting or ilying movement, but byV resting thereon with spring-tension, as shown best in Fig. 4, Will prevent the card or article from slipping sidewise away from the gage-pin.

By actual usage I have demonstrated the efieieney of this gagepin, and all the statements of facts herein made are based upon said experience.

NWhatl claim, and desire to secure by Letters Patent of the United States, is as follows: The printers gageepin herein described, comprising the Vertical face-plate c, having the vertical thin-edged side flanges or feet c and the horizontal top flange or guard-lip c3, the spring pin or brad o2 applied as described between the feet c', and the spring-finger C4 projecting forwardly from the face-plate and adapted to Work between the lines of type in the printing action, all arranged and operating substantially as and for the purposes set forth.

In testimony whereof I ailix my signature in presence ol two Witnesses.

JAMES XV. EGGLEL TON. lVitnesses:

JAS. F. XVILLIAMSON, E, F. ELMoRE. 

